Device for the final binding of yarn on bobbins for ring spinning and twisting machines

ABSTRACT

A device for the binding of thread on a bobbin in a ring spinning and twisting machine is disclosed in which a ring rail is associated with a plurality of spools mounted on vertical rotating spindles. Means are disclosed for reciprocating said ring rail along a vertical path in order to enable the yarn to be wound around the respective bobbin. The invention is characterized by feeding yarn to each bobbin from a feed roller, each feed roller being mounted on a common shaft which is driven through a suitable first transmission system from a main driving shaft. The reciprocal movement of the ring rail can be selectively driven by the same main driving shaft through the first transmission system which includes a first clutch device and means adapted to cause the reciprocation of the ring rail. Alternatively a third transmission system can be connected to the said first transmission through a second clutch device in order to cause the ring rail to be moved with a speed proportional to the delivery speed of the yarns fed by the feed rollers. The first and second clutch devices are associated with control means which can be actuated selectively by a manually operable control device or by an automatic control device actuated automatically as the ring rail reaches its uppermost position when the binding operation is completed. The first and second clutch devices are so arranged that the first clutch device is in its operative position when the second clutch device is disengaged and viceversa.

United States Patent [191 Einaudi DEVICE FOR THE FINAL BINDING OF YARN ON BOBBINS FOR RING SPINNING AND TWISTING MACHINES [75] Inventor: Mario Einaudi, Torino, Italy [73] Assignee: Nazionale Cogne S.p.A., Torino,

' Italy [22] Filed: Oct. 22, 1971 [21] Appl. No.: 191,933

[30] Foreign Application Priority Data 3,080,701 3/1963 Kennedy et al. 57/54 3,097,475 7/1963 Hooper et al 57/99 3,113,414 12/1963 Negishi 57/54 3,256,683 6/1966 Andersen et al... 57/54 3,357,167 12/1967 Jones et a1. 57/54 Primary Examiner-John Petrakcs Attorney, Agent, or Firm--Kenyon & Kenyon Reilly Carr 8!. Chapin Apr. 16, 1974 [5 7] ABSTRACT A device for the binding of thread on a bobbin in a ring spinning and twisting machine is disclosed in which a ring rail is associated with a plurality of spools mounted on vertical rotating spindles. Means are disclosed for reciprocating said ring rail along a vertical path in order to enable the yarn to be wound around the respective bobbin. The invention is characterized by feeding yarn to each bobbin from a feed roller, each feed roller being mounted on a common shaft which is driven through a suitable first transmission system from a main driving shaft. The reciprocal movement of the ring rail can be selectively driven by the same main driving shaft through the first transmission system which includes a first clutch device and means adapted to cause the reciprocation of the ring rail. Alternatively a third transmission system can be connected to the said first transmission through a second clutch device in order to cause the ring rail to be moved with a speed proportional to the delivery speed of the yarns fed by the feed rollers. The first and second clutch devices are associated with control means which can be actuated selectively by a manually operable control device or by an automatic control device actuated automatically as the ring rail reaches its uppermost position when the binding operation is completed. The first and second clutch devices are so arranged that the first clutch device is in its operative position when the second clutch device is disengaged and vice-versa.

5 Claims, 2 Drawing Figures DEVICE FOR THE FINAL BINDING OF YARN ON BOBBINS FOR RING SPINNING AND TWISTING MACHINES This invention relates to a device for controlling the vertical movement in a ring rail of ring spinning and twisting machines for binding yarn on the bobbins at the end of the winding operation. By the use of this invention a constant length of yarn is wound around the outer bobbin surface to bind the yarn on each bobbin irrespective of the working conditions of the machine during the winding of the yarn around each spool.

It is well known that during the winding of a bobbin, the winding speed depends upon the count of the yarn- ,i.e., the number designating the size of a yarn, and upon the degree of twist to be imparted to the yarn which has to be wound around a spool.A coarse yarn requires few twists per meter while a fine yarn requires a high number of twists.

Thus, yarn having a low number of twists is delivered out of the drawing roller at a speed of 30 m/sec for instance, while yarns having a high number of twists are fed more slowly at a speed of m/sec, for instance.

It is well known that during the winding operation the reciprocated movement of the ring rail must be carried out at a speed smaller than the delivery speed of the feed rollers so as to prevent any breakage of the yarn.

The methods for binding bobbins, previously known require a careful regulation of the lowering speed of said ring rail during the binding step relative to the different working characteristics of the yarn. This results in a consequent loss of time, incidental faults in the regulation and yarn breakage.

In order to overcome these difficulties, it is a common practice to adjust the lowering speed of the ring rail in order to perform the binding of the bobbins and so asto adapt it to the yarns of the finest counts, i.e., to the low delivery speed of the feed rollers provided for such counts. One problem which is encountered using this method is that a considerable amount of yarn is lost due to the excessive length of yarn wound around each, bobbin when yarns of the coarsest counts are used requiring a high delivery speed from the feed rollers.

The use of the device of the invention, however, enables the constant use of the'same length of yarn in the binding of bobbins since said device permits the synchronizing of the lowering of the ring rail with the delivery speed of the yarns coming out of the feed rollers during the binding step.

In theaccompanying drawing is shown an embodiment of the device for performing the binding of bobbins with a constant lengthof yarn. In said drawing: FIG. 1 is a diagrammatic partial perspective view of a spinning frame, where only one spool is shown for clarity; and FIG. 2 is an axial section of one of the clutch devices included in the motion transmissions.

ln FIG. 1, a bobbin 1 on which yarn 10 is to be wound is fed by a feed roller 8. Each feed roller 8 of a spinning frame is mounted on a common shaft 8a with the bobbin 1 being mounted on a spindle 23 which rotates around the axis n-n and which is driven by known driving means not shown in the drawing. Only the operation of the bobbin 1 will be hereinafter described since the other bobbins,not shown,of the same ring spinning frame operate in the same way.

The shaft 8a is driven by a main driving shaft 6 of a motor or other suitable driving means (not shown),

through a transmission means including pulley 14 mounted on said shaft 6. This shaft actuates pulley 14b through a belt 14a or the like. Said pulley 14b is secured to the shaft 140 on which is also secured pulley 14d which transmits motion through belt Me or the like to pulley 14f secured to the shaft 8a. On the drive shaft 6 the two cooperating members 7 and 7a of a clutch device are also mounted, the first of which is mounted on the shaft 6 so as to be able to slide along said shaft 6, while the other is made integral with a worm screw 11 which is meshed with a helical gear 12 secured to the shaft 13. Shaft 13 carries a cam 19 which cooperates with a cam follower 20 carried by a bar 21 cam follower 20 can be reciprocated along vertical guideways,not shown in the drawing, in response to the rotary movement of the cam 19 driven by the shaft 13 only if the clutch device 7,7a is in its operative position.

Attached to the bar 21 is a chain 22 or the like, actuating a gear 17 secured to the shaft 30, on which is mounted drum 24 operatively driven by said shaft 30 through a reduction gear system 25. Shaft 30 and the parts connected thereto are supported on bracket 26 which is in turn mounted on the stationary frame of the spinning machine,not shown in the drawing.Around drum 24 can be wound and unwound the cables 18a,18b which pass around idling pulleys 31 supported by the stationary frame. In the ends of said cables l8a,18 are suspended the ring rail 2.

The ring rail 2 performs vertical reciprocating movements during the winding of the yarns 10 depending upon the configuration of the cam 19 when the clutch device 7,7a is operative.The shaft 140 also carries the two members 9 and 9a of a second clutch device F IG. 2),said clutch device 9,9a being inoperative during the winding step of the spinning machine, i.e., as the first clutch device 7,7a is in operative position.The member 9 is connected to shaft 140 so as to be able to perform only movements parallel to its axis,while the member 9a is made integral with the hollow shaft 27 rotably mounted on an axial projection 14c of the shaft 14c. The shaft 27 has secured thereto a pulley 16 which is operatively connected to the pulley 29 secured on the shaft 30 through a suitable transmission system comprised of members 28 and 28f.

The first clutch device 7,7a, as well as the second clutch device 9,9a, are associated with control devices,not shown in the drawing, which operate in synchronism to cause the clutch members 7,7a to be engaged with one other as the clutch members 9,9a are caused to be disengaged and vice versa. Both said control devices are selectively actuated by an automatic microswitch or by a manually operable pushbutton,not shown in the drawing. The microswitch is so positioned as to be automatically actuated by the ring rail 2 at the end of the winding phase of the yarn 5 on the bobbin 1 as said bobbin 1 is filled up. Alternatively the pushbutton will be actuated by the operator when the binding of a bobbin has to be carried out on an incomplete bobbin in the event the lot of yarn is about to be exhausted.

During the winding cycle the shaft 8a rotates with a predetermined speed and the ring rail 2 which carries the rings 15 reciprocates along a vertical path at a different speed, the value of which depends upon the count of the treated yarn 5.

When the filling of the bobbin 1 as well as the other bobbins 1 of the same ring rail 2 has been completed,-

said "ring rail 2 will be positioned at the height of the upper most section 3 of the bobbin 1. At this instant begins the final binding step which involves the wrapping of a length of yarn around the outer surface of the bobbin. This will be performed during the lowering stroke of the ring rail 2 which moves from the height of the section 3 down to the height of the lower section 4 of the bobbin 1. During this binding operation a constant length 5 of yarn has to be wound around the bobbin 1, whatever may be the count of the treated yarn 10. For such a purpose, as the ring rail 2 reaches its uppermost position,it actuates the aforesaid microswitch which in turn actuates the control devices associated with the first and second clutch devices 7,7a and 9,9a respectively,so that the clutch device 7,7a becomes inoperative and the clutch device 9,9a becomes operative. At this point movement of the ring rail 2 is no longer controlled by the cam 19 which is stopped,but, rather is controlled by the shaft 140 which transmits the motion to the shaft 8a and to the shaft 30 through the clutch device 9,9a,the shaft 27,the pulley 16, the transmission means 28 to 28f and the pulley 29. Therefore the shaft 30 causes the drum 24 to rotate at a speed which is proportional to that of the shaft 8a on which are secured the feed rollers 8.

In the event that a binding of a not yet full bobbin 1 has to be performed,as for'example when a lot of yarn is about to be exhausted,the operator actuates the pushbutton or the like so that the control devices associated with the first and second clutch devices cause the members 7,7a to be disengaged and the members 9,911 to be brought in mesh with one other.

It will be evident that the means controlling the clutchs could be also hydraulic,mechanical,or of any other suitable kind.

In the same way, while the embodiment is described in terms of a mechanical transmission means, it will be evident to one skilled in the art that an electric, electromechanical, pneumatic or other type of transmission system can be substituted for the mechanical system without departing from the spirit of the invention.

I claim:

1. In combination,

a rotatable shaft having a plurality of feedvrollers for feeding yarn thereon;

a vertically movable ring rail having a plurality of rings for encompassing respective rotatable spools therein;

a main drive shaft;

a first transmission between said main drive shaft and said rotatable shaft for driving said rotatable shaft at a predetermined speed;

a first clutch selectively engageable with said first transmission;

a second transmission between said first clutch and said ring rail for reciprocating said ring rail vertically at a first speed for winding of a yarn bobbin on the spools with said first clutch engaged with said first transmission;

a second clutch selectively engageable with said first transmission in alternating manner with said first clutch; and

a third transmission between said second clutch and said second transmission for reciprocating said ring rail at a second speed proportional to said predetermiend speed of said rotatable shaft to bind a constant length of yarn on a spool with said second clutch engaged with said transmission.

2. The combination as set forth in claim 1 wherein said second transmission includes a cam having a predetermined cam surface corresponding to the motion to be performed by said ring rail, a follower for moving in response to said cam and means for amplifying the movement of said follower.

3. The combination as set forth in claim 1 further comprising means for actuating said first and second clutches in alternating manner.

4. The combination as set forth in claim 3 wherein said latter means is a manually operated switch.

5. The combination as set forth in claim 3 wherein said latter means is a microswitch positioned in the path of said ring rail at an uppermost point of said path for automatic actuation by said ring rail.

;UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3, 803 82 5 Dated April 16 g 97 lnjvent Mario Einaudi It is certi fied that error appears in the above-identified patent and that said Letters Patentare hereby corrected-as shown below:

/ Column 2, line 27, change "In" to On r Column 2, line M, change "and" to to Signed and sealed this 3rd day OfSeptembeT 1974.

(SEAL Attest: I

MCCOY GIBSON, JR. C. MARSHALL DANN Attestlng Officer Commissioner of Patents FORM PO- 1050 (10-69) V uscoMM-oc 60376-P69 i U. S. GOVIRNMINT PRINTING OFFICE l9. O-Jll-JQI, 

1. In combination, a rotatable shaft having a plurality of feed rollers for feeding yarn thereon; a vertically movable ring rail having a plurality of rings for encompassing respective rotatable spools therein; a main drive shaft; a first transmission between said main drive shaft and said rotatable shaft for driving said rotatable shaft at a predetermined speed; a first clutch selectively engageable with said first transmission; a second transmission between said first clutch and said ring rail for reciprocating said ring rail vertically at a fiRst speed for winding of a yarn bobbin on the spools with said first clutch engaged with said first transmission; a second clutch selectively engageable with said first transmission in alternating manner with said first clutch; and a third transmission between said second clutch and said second transmission for reciprocating said ring rail at a second speed proportional to said predetermiend speed of said rotatable shaft to bind a constant length of yarn on a spool with said second clutch engaged with said transmission.
 2. The combination as set forth in claim 1 wherein said second transmission includes a cam having a predetermined cam surface corresponding to the motion to be performed by said ring rail, a follower for moving in response to said cam and means for amplifying the movement of said follower.
 3. The combination as set forth in claim 1 further comprising means for actuating said first and second clutches in alternating manner.
 4. The combination as set forth in claim 3 wherein said latter means is a manually operated switch.
 5. The combination as set forth in claim 3 wherein said latter means is a microswitch positioned in the path of said ring rail at an uppermost point of said path for automatic actuation by said ring rail. 